Abstract: A force transfer mechanism including a force lever through which an input force is transmitted to an output member with mechanical advantage only after the output member encounters sufficient resistance to overcome a friction connection between an input member and the output member indicative of the input member having moved from a retracted position to an operative position. The resultant movement of the input member relative to the output member in the absence of the frictional connection therebetween allows the input member to engage the end of force lever that is normally spaced-apart therefrom and to accordingly drive the output member with a force corresponding to the input force multiplied by the ratio of the force lever only in the operative position of the input member.

Abstract: A railway car pressure control valve having an adjustable middle body member. An air supply chamber connected to a source of compressed air and an output chamber connected to an output passage. An exhaust chamber opened to the atmosphere. An air supply valve spring biased toward a valve seat. A hollow exhaust valve rod having a valve tip located adjacent the air supply valve. A control piston including a control piston diaphragm is attached to the inside wall of the main valve body. A balance piston including a balance piston diaphragm attached to the inside wall of the main valve body. A plurality of first and second radially extending fins carried by the balance piston and the inside wall of the main valve body, respectively. A protective member interposed between the balance piston diaphragm and the radially extending fins to prevent wave distortion of the balance piston diaphragm and preclude increase resistance to movement of the main piston.

Abstract: A cutting device for collecting a quantoback analysis sample in a hot state from a preferred position of a continuously cast steel piece is disclosed. According to this invention, a dish like recess is cut on the surface of a cast steel piece while leaving a center column, then the root of the center column is cut and the cut free portion taken out as a sample.

Abstract: A load dependent valve for railway cars including first and second springs, each having one end contacting a balance piston. A first spring adjusting mechanism for adjusting the compressive force of the first spring and a second spring adjusting mechanism for adjusting the compressive force of the second spring. A valve seat disposed in an air supply passage which is connected between an air supply chamber and an output chamber. An air supply valve is biased to seat on the valve seat. An exhaust valve rod having a valve tip facing the air supply valve and fitting the air supply passage and has an exhaust air bore, one end opens at the valve tip and the other end opens at the exhaust chamber. The control piston including a control piston diaphragm fixed to the main valve body and fixed to the control piston. The balance piston includes a balance piston diaphragm which is fixed to the main valve body and also is fixed to the balance piston main body.

Abstract: A railway vehicle controller apparatus having a housing in which a rotatable shaft having a first portion positioned within the housing and a second portion extending out of the housing is provided. A control mechanism is connected to the second portion of such rotatable shaft. Such control mechanism is operable by an operator of such railway vehicle. A detection unit is positioned within the housing to detect a rotational position of the rotatable shaft. The detection unit includes a unit to provide an electrical signal indicative of such rotational position of the rotatable shaft. Such a signal is used as an acceleration or deceleration command. A control resistance mechanism engages the rotatable shaft to provide a controlled resistance to rotation of such rotatable shaft.

Abstract: A compressed air pressure supply system includes an air compressor device, an air dryer device having a recoverable desiccant for removing moisture contained in the compressed air delivered from the air compressor device, an air reservoir for storing the dried compressed air from the dryer device, a regenerating valve which is mounted on the air compressor device on the side of the dryer device and opens the air compressor device to the atmosphere under the control of external commands, a governor device which causes a command to be transmitted to the regenerating valve when air pressure prevailing inside the air reservoir has attained a maximum value and which cancels this command when the air pressure in the reservoir has reached a minimum value, an oil separator mounted between the air compressor device and the dryer device for removing residue contained in the compressed air delivered from the air compressor device, a non-return valve for preventing the flow of fluid from the dryer device toward the drain

Abstract: A vital pressure regulating system is constructed using an alternating current system, and the absolute value of an output signal is inversely proportional to the air pressure in the main air reservoir and therefore if some critical circuit component fails, the output of a comparator circuit becomes a direct current signal in the same way as the case in which the air pressure in the main air reservoir is higher than the predetermined upper limit value so that the switch shuts off the air compressor to achieve fail-safe operation.

Abstract: A wheel slip detection system which is especially effective in cases where a gentle or sluggish slip simultaneously occurs on all the axles of a vehicle. For instance, when the velocity difference (.DELTA.V) between the standard speed, namely, the maximum axle speed, of two or more axles exceeds the preset velocity, this condition is detected as a slip state. In the present system, the first and second velocity values V.alpha.1 and V.alpha.2 are set, and it is detected as a slip of all axles when the following (a), (b), (c) states occur at each axle wherein:(a) V.alpha.1<.DELTA.V,(b) Max. .DELTA.V<V.alpha.2,(c) Max. axle acceleration<Standard acceleration.

Abstract: A pressure control valve for railway vehicles having a variable control mechanism for adjusting the gain of the output pressure to input pressure by controlling the effective area ratio on opposite sides of a piston. A balance diaphragm disposed on one side of the piston and a control diaphragm disposed on the other side of the piston. A plurality of first radial fins carried by the piston and a plurality of second radial fins carried by the body of the control valve. The ends of the first fins are placed between the ends of the second fins so that the edges form a slant surface. Thus, at least one of the diaphragms is supported by the slanted surface of the first and second fins. A manual adjusting mechanism for varying the position of the piston of the valve for changing the ratio of the effective areas.

Abstract: An electromagnetic straight air brake equipment, especially to an air brake command system for railway vehicles for controlling the brake pipe pressure by employing an electric brake command type brake controller and electropneumatic convertor valve arrangement. This invention makes it possible to assemble the brake controller and the master controller into one handle, and requires no pneumatic piping leading to the operator's cab since the pneumatic apparatus is all located beneath the floor of the railway vehicle.

Abstract: A brake and/or propulsion command arrangement for railway vehicles, especially for abnormality detection of a dual brake system having a cam controller for producing ON-OFF control signals.The abnormal detection system employs a comparing circuit for comparing the control signals, an interlocking circuit for producing a verification signal of the position of the cam controlling, and evaluating circuit for producing a trouble detection signal when the control signals are unmatched and during the presence of the verification signal.

Abstract: An automatic air brake system for accelerating the exhaustion of the pressure in the brake line of a train for more rapidly applying the brakes on all the railway vehicles. A flow rate detector connected to the brake line of the locomotive to detect the flow of air in the brake line. A pilot chamber of a relay valve is supplemented when a flow signal from the flow rate detector exceeds a predetermined value and the supplementation is stopped when the flow rate drops below a predetermined value. The pilot chamber is exhausted in response to a brake application command and is pressurized in response to a brake release command. The relay valve includes an output chamber which is connected to the brake line of the locomotive, and the brake line pressurizes and exhausts the output chamber in response to the pressurization and exhaustion of the pilot chamber.

Abstract: A pull-type booster includes a hollow body in which a movable wall is movably received to divide an interior thereof into a negative pressure chamber and a pressure-variable chamber. The movable wall has a tubular portion extending outwardly of the body and having an axial internal bore. The tubular portion is disposed in a room or chamber. A tubular cover member is mounted around the tubular portion to cover it and has an inlet in communication with the internal bore. An air tube has one end connected to the inlet, and the other end of the air tube is disposed outside of the room.

Abstract: An automatic air braking system for a railway train having a flow detector for sensing the flow of pressurized air in the brake line during a brake release command time. A pilot chamber located in a relay valve which is pressurized when a signal from the flow detector exceeds a first predetermined pressure value and which stops the pressurization when the flow signal drops below a second predetermined pressure value. The brake line runs from the lead unit or locomotive of the train and through the railway vehicle or freight cars connected to and pulled by the lead unit or locomotive. The relay valve which is an automatic-lapping-type is located in the lead unit or locomotive in which the pilot chamber is exhausted in response to the reception of a brake release command. An output chamber, which is located in the relay valve, is connected to the brake line of the lead unit or locomotive.

Abstract: A magnetic speed detecting arrangement for a railway vehicle including a number of permanent magnets fixed on the outer circumference of an axle of the railway vehicle at fixed intervals in which the distance between two adjacent permanent magnets is larger than the width of the permanent magnets. A detector holder is fixed to the sprung portion of the body of the railway vehicle. A number of magnetic sensing elements are mounted to the detector holder and face the outer circumference of the axle. The number of permanent magnets may vary between 7 and 17 and the number of magnetic sensing elements may vary between 4 and 9 so that the product of the permanent magnets and magnetic sensing elements causes the detector to produce at least 60 pulses per revolution of the axle.

Abstract: A method and a device for collecting a quantoback analysis sample in hot state from a preferred position of a continuously cast steel piece are disclosed. According to this invention, a dish like recess is cut on the surface of cast steel piece while leaving a center column, then the root of left center column is root cut and taken out as sample. A cutting device and a way for accessing the cutting device are presented for operating this process.

Abstract: A two-stage air compressor unit having an intercooler and aftercooler placed in side by side relationship to form an integral unit which is cooled by forced air blown by a motor driven fan and which has the inlet and outlet parts located in such a manner that little, if any, heat transfer occurs between the intercooler and the aftercooler so that greater cooling efficiency is realized.

Abstract: A compressed air supply system including an electric motor for driving an air compressor. An air reservoir connected to an outlet of the air compressor via a cooler. A dryer and a check valve, a pressure sensor coupled to the air reservoir for sensing the pressure therein. An unloading valve coupled to the outlet of the air compressor. A control circuit coupled to the electric motor and the unloading valve. A protective circuit coupled to the control circuit and the unloading valve for preventing the motor from starting under an overload condition and for averting the unnecessary running of the motor and driving of the air compressor.

Abstract: A fluid pressure control valve includes a housing having an inner hole and a plunger movably disposed in the inner hole, the housing having inlet and non-pressure chambers defined herein at one end of the plunger and an outlet chamber defined therein at the opposite end of the plunger, the housing also having a passage communicating the outlet chamber with the inlet chamber. A valve device is disposed in the passage and openable and closable in response to movement of the plunger. A preloading spring is disposed in the housing for normally urging the plunger in a direction to open the valve device. The housing comprises a cylindrical member having one open end and a cover member closing the open end. A spring seat is disposed in the cylindrical member in engagement with the cover member, the preloading spring acting between the spring seat and the plunger. The spring seat is force-fitted in the inner hole of the housing or in the cover member.

Abstract: A spring brake assembly having a body portion in which a piston is mounted for reciprocal movement. A piston guide means engages a stem portion of the piston and an end of the body portion. A brake spring is caged between an inner surface of a face portion of the piston and an end of the body portion. Engageable at one end thereof with the stem portion of the piston is a pushrod which also extends coaxially out of the end of the body portion. A clutch including control and operating devices is provided.